Small steel split pulley.



N. BARRY & c. ALLEN. SMALL STEEL SPLIT PULLEY.

APPLICATION FILED MAR-13.19%.

Patented Apr. 18, 1916.

THE COLUMBIA PLANOURAPH .50., WASHINGTON, D. C.

UNITED STATES PATENT OFFICE...

NICHOLAS BARRY AND CLYDE ALLEN, 0F MUSCATINE, IOWA, ASSIGNORS T0 BARRY COMPANY, OF MUSGATINE, IOWA, A CORPORATION. OF IOWA.

SMALL STEEL SPLIT PULLEY.

Specification of Letters Patent.

Application filed March 13, 191:5. Serial No. 14,145.

ence to pulleys of small size :made of "sheet metal.

The objects of the invention are to provide a light simple and strong meta-l split pulley economical to manufacture and having a substantially uniform belt surface; also to make each half or section of the pulley of practically one piece; to provide verysimple means whereby the pulley'sections can be readily secured in position upon a shaft; and to have the section fastening devices practically inseparable from the sections.

The invention consists in the novel construction of such pulley; and novel elemental features thereof; and a clear understanding of the invention will be derived from the following detailed explanation of the pulley illustrated in the accompanying drawings, which illustrate one practical embodiment of the invention; and the appended claims summarize the essential novel features of construction and novel combinations of parts in said pulley for which protection is desired.

In said drawings: Figure 1 is a side view of a complete pulley, on a shaft. Fig. 2 is an end view thereof. Fig. 3 is a central transverse section of the pulley on line 33, Fig. 1. Fig. 4 is a similar section on line 4-4, Fig. 1. Fig. 5 is a detail section on the line 5-5, Fig. 2. Fig. 6 is a transverse section on the line 6-6, Fig. 3.

As shown in the drawings, the pulley is made in two separable halves or sections, and as such sections are similarly constructed a description of one will explain both; like features in each section being similarly lettered in the drawings. v

Each pulley section comprises a rim portion 1, preferably made of sheet steel, and

having its side edges inwardly curved as-at 1 to stiffen and strengthen the rim and prevent its yielding or springing under the belt pressure.

From each end of the rim portion 1 extends a preferably integral tongue, which t ngues first extend inwardly toward each other as indicated at 2 on a diametrical plane of the pulley; but the inner portions of these tongues are curved as shown at 2, 2, so as to fit closely against the opposed exterior of the shaft S tov which the pulley may be applied. Preferably the part 2 of one tongue is shouldered asat 2 so that it can be lapped over the outer side of the part. 2 of the opposed tongue, the end of which makes a close butt joint against "the shoulder of the lapped tongue as indicated at 2", and the lapped portion 2 of the tongues may be rigidly united, preferably by electric welding or spot welding, as indicated at 2' and when so united the said portions form the hub orwclamping portion of the pulley section, such hub port-ion being adapted to fit the shaft, as indicated in Fig. 2.. When two such similar but opposite pulley sections are clamped together around a shaft the hub portions support and center the pulley upon such shaft. sections may be clamped together by any suitable means, preferably as hereinafter explained.

Within each pulley section, and adjacent to one end thereof, is preferably secured a scre-wretaining housing 3 preferably formed of a metal plate having its ends bent inwardly as at 3* Fig. 6 to form cylindric chambers, which are closed at bottom by bending outwardly the inner portion of the plate, as indicated at 3 xand on the outer end of the plate is a lip portion 3. This housing is adapted to fit againstthe inner wall .of the pulley rim at one end thereof and against the adjacent part 2 of the hub portion thereof, and may be secured rigidly in position by welding or otherwise attaching .the lip 3 to the inner side of the rim section, as'indica-ted at 3 in the drawing. Within th'e chambers of this housing are placed screws 5. The threaded ends of screws'5 are adapted to project through apertures in the parts 3 of the housings and portions 2 of the tongues 2, and to engage screw threaded openings 2 in the opposed portions 2 of the hub member of the The pulleyopposed pulley section, when the pulley is forations 1 in the rim.

By means of the housings the screws are always retained in the sections ready for use,

. even when the pulley sections are separated.

By simply placing two opposed similar sections around a shaft and then turning the screws 5 by suitable tools, the sections will be locked together and clamped upon such shaft, together forming a complete pulley ready for use thereon. Such pulley can be readily detached from the shaft by simply unscrewing the screws 5; and when such screws disengage the screw-threaded-openings in the opposed section the screws are retained within the housing of their own section so that they are not lost. The perforations 1 in the rim sections are very small, and as the pulley rim does not have to be chambered to accommodate the fastening bolts, the effective belt engaging surface of the pulley is not impaired. When the pulley is taken apart there is no chance of losing the screws, and there are no nuts to lose.

or otherwise to the sections, so as to be The screws 5 are placed in position within the housings before the latter are permanently attached to the pulley sections; then the housings are attached by welding rigidly held in position, and always retain the screws in place and in position to engage the threaded openings in the opposed section of the pulley, when two such sections are properly juxtaposed on opposite sides of a shaft.

With this construction no jam nuts or lock-nuts will ordinarily be employed for the tighter the screws are turned the more :securely they are bound as the metal of the tongues slightly springs or yields as the screws are tightened up, and because of such yielding or springing practically lock the screws.

What we claim is:

1. A split pulley section comprising a rim member made of sheet metal and having integral tongues at its opposite ends extend-' ends of said tongues being lapped and united, substantially as described.

8. A split pulley section comprising a rim member made of sheet steel, and having integral tongues at its opposite ends extending inward toward each other, the inner portions of said tongues being bent to engage a shaft, one of said tongues having a shoulder against which the other end of the tongue abuts, and the shouldered tongue having a portion overlapping the exterior of the other tongue, the overlapped parts of the tongues being united.

4; In combination a split pulley comprising opposite members each having a rim portion and a hub engaging portion, with a housing attached to each section, and fastening devices loosely confined in said housing and adapted to be projected to engage the opposed pulley section.

. 5. In a split pulley the combination of opposite sections each comprising a rim member and a hub member, the latter having screw threaded apertures; with a housing attached to each section and fastening screws therein adapted to engage threaded open ings in the opposed hub member to secure the pulley sections together.

6. In combination a split pulley comprising opposite members each having a rim portion and a hub portion; with a housing attached to each pulley section, and screws confined in said housings adapted to be projected to engage corresponding screw threaded openings in the opposed pulley section hub portion.

7 In combination a split pulley comprising opposite members each having a rim portion and an integral hub engaging portion, the hub portion being provided with threaded parts; with a housing plate at one end of each pulley section; screws confined in said housings and adapted to be projected to engage the screw threaded parts of the hub engaging portion of the opposed pulley section.

8. In a split pulley the combination of opposite sections each comprising a rim member made of sheet steel, and having an integral inwardly extending tongue on each end, the inner portions of said tongues being bent to engage a shaft, and the inner ends of said tongues being united; one of said tongues having screw threaded apertures and the other of the tongues also having apertures, screws loosely confined to one end of each section within the rim and adapted when projected to engage the screw threaded apertures in the tongue of the opposed rim section.

9. In a'split pulley the combination of opposite sections each comprising a rim member'made of sheet steel and having an integral inwardly extending tongue on each end, the said tongues being bent to engage a shaft, and having their ends lapped and welded together; one of said tongues having screw threaded apertures in it adjacent the end of the rim and the other of the tongues also having apertures; a housing attached to one end of each section and within the rim thereof, and screws loosely confined in said housing and adapted to be projected through the apertures in the adjacent tongue and engage the screw threaded apertures in the tongue of the opposed rim section.

10. A split pulley section comprising a rim member made of sheet metal, and having its side edges turned inwardly to form stiffening beads and having integral tongues on its opposite ends extending inward toward each other, the said tongues being curved to engage a shaft and having their meeting ends rigidly united.

11. A split pulley section comprising a rim member made of sheet steel, and having integral tongues at its opposite ends extending inward toward each other, one of said tongues having a shoulder against which the end of the other tongue abuts, and the shouldered tongue having aportion overlapping the exterior of the other tongue said overlapped portions of the tongues being rigidly united.

In testimony that we claim the foregoing as our own, we aflix our signatures.

NICHOLAS BARRY. CLYDE ALLEN.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. O. 

